Question

What is the equivalent strength of concrete for the Mix Ratio of 1 : 2 : 4?

• A. M 10
• B. M 15
• C. M 20
• D. M 25

Answer 1

The correct option is B M 15

$\text{M 25}\to 1:1:2$
$\text{M 20}\to 1:1.5:3$
$\text{M 15}\to 1:2:4$
$\text{M 10}\to 1:3:6$
$\text{M 5}\to 1:4:8$

$\text{M 25}\to \text{Column, beam}$
$\text{M 20}\to \text{Water tank, wall}$
$\text{M 15}\to \text{Beam slab, Pavement}$
$\text{M 10}\to \text{Plinth \& base of road}$